61644552 has 16 divisors (see below), whose sum is σ = 154111440. Its totient is φ = 20548176.

The previous prime is 61644547. The next prime is 61644581. The reversal of 61644552 is 25544616.

61644552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1284238 + ... + 1284285.

It is an arithmetic number, because the mean of its divisors is an integer number (9631965).

Almost surely, 2^61644552 is an apocalyptic number.

It is an amenable number.

61644552 is an abundant number, since it is smaller than the sum of its proper divisors (92466888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61644552 is a wasteful number, since it uses less digits than its factorization.

61644552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568532 (or 2568528 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 61644552 is about 7851.4044603498. The cubic root of 61644552 is about 395.0313535973.

The spelling of 61644552 in words is "sixty-one million, six hundred forty-four thousand, five hundred fifty-two".